[Usefulness of coronary angioplasty (PTCA) of the infarct-related artery in patients with prior myocardial infarction--follow up of infarct zone pre- and post-angioplasty by stress thallium scan].

Abstract	We studied the efficacy of coronary angioplasty (PTCA) of the infarct-related artery in 29 patients with prior myocardial infarction by stress thallium scan. Twenty-seven patients had anterior myocardial infarction (single LAD disease), one had inferior (single RCA disease) and one had posterior (single LCX disease). According to the stress-redistribution thallium scintigraphic finding before PTCA, the patients were classified in 4 groups; (A): three patients with complete redistribution. (B): fourteen patients with incomplete redistribution. (C): seven patients with partial redistribution. (D): five patients with no redistribution. After PTCA, the parameters of residual ischemia in the infarct area (% RD and Thallium ischemic score = TIS) were improved significantly but those of infarct size (RD% uptake and Defect Score = DS) were improved slightly in group A. In group B and C, % RD, TIS, RD% uptake and DS were all improved significantly. In group D, TIS was improved slightly and DS was improved slowly 3 months after PTCA. Group A had high probability of viable muscle and group D had high probability of scar at the infarct zone. Group B and C showed intermediate type between group A and D. The change of infarct area after PTCA was variable in 4 groups but both residual ischemia and infarct size decreased in all groups. Thus, PTCA of infarct-related coronary artery is useful even in the patients with prior myocardial infarction.
Authors	H Chiba, T Nishimura, T Uehara, K Hayashida, I Mitani, T Matsuo, T Sumiyoshi, K Haze
Journal	Kaku igaku. The Japanese journal of nuclear medicine (Kaku Igaku) Vol. 26 Issue 7 Pg. 835-44 (Jul 1989) ISSN: 0022-7854 [Print] Japan
PMID	2810902 (Publication Type: Journal Article)
Chemical References	Thallium Radioisotopes
Topics	Adult Aged Angioplasty, Balloon, Coronary Female Follow-Up Studies Humans Male Middle Aged Myocardial Infarction (diagnostic imaging, therapy) Physical Exertion Radionuclide Imaging Thallium Radioisotopes

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